Questions about spatial data

 Your grid above has 8*6 = 42 points. Do you want to generate a random 

That was a subtle Hitchhikers Guide To The Galaxy reference there, 
honest,  and not a stupid dumb multiplication mistake on my part after 
working four 18-hour days on the trot...

  I will now write out 1000 times, 6 times 8 is 48, seven eights are 
fifty-six, eight eights are.. oh hang on I've run out of fingers...

Barry